Primary header tube size for a 383
06-08-2002, 10:28 PM
#1
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Car: '89 Formula 350
Engine: 5.7L L98 TPI
Transmission: 700-R4 Automatic
Axle/Gears: 7.5 disc posi 3.23
Primary header tube size for a 383
I was wondering if you people know if I can get away with a 1 5/8" primary header tube with a 450 flywheel horse 383 TPI?
06-09-2002, 06:31 PM
#3
I'm using 1 5/8 full length hedmans on my 383. I think 1 3/4 would be a little better but I didn't want to go through the extra hassle of making the 1 3/4 hookers fit...I bought them and they didn't fit my car well at all. I saw a recent magazine article where they built a 383 it lost about 10-12hp on the top end with 1 5/8 vs 1 3/4.
06-10-2002, 10:44 PM
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Car: '85 Z28
Engine: 305
Transmission: WC T5, 3.23 posi
If you can, go with the 3/4". I think hooker's lt (2055) headers are 3/4", of course those are lt's though, but I wouldn't reccomend shortys on a 383 unless you have to.
06-10-2002, 10:52 PM
#6
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I've got 1 5/8 on mine.. shorties to custom made Y-pipe to flowmaster collector, to NO cat, to dynomax muffler, WORKS GREAT!
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